package cn.wlinker.video.monitor.config;

import cn.hutool.log.StaticLog;
import org.springframework.context.annotation.Configuration;
import org.springframework.core.annotation.Order;

import javax.servlet.*;
import javax.servlet.annotation.WebFilter;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;

/**
 * 跨域请求过滤器-配置允许跨域请求
 *
 * @author gxsjx
 * @version 1.0
 * @date 2025/5/18
 * Copyright © wlinker.cn
 */
@WebFilter(filterName = "CORSFilter", urlPatterns = {"/*"})
@Order(value = 1)
@Configuration
public class CorsFilter implements Filter {
    @Override
    public void init(FilterConfig filterConfig) throws ServletException {

    }

    @Override
    public void doFilter(ServletRequest servletRequest, ServletResponse servletResponse, FilterChain filterChain)throws IOException, ServletException {
        //StaticLog.info("Filter 过滤器 执行 了");
        HttpServletRequest request = (HttpServletRequest) servletRequest;
        HttpServletResponse response = (HttpServletResponse) servletResponse;

        // 响应标头指定 指定可以访问资源的URI路径
        response.setHeader("Access-Control-Allow-Origin", request.getHeader("Origin"));

        //响应标头指定响应访问所述资源到时允许的一种或多种方法
        response.setHeader("Access-Control-Allow-Methods", "POST, GET, PUT, OPTIONS, DELETE");

        //设置 缓存可以生存的最大秒数
        response.setHeader("Access-Control-Max-Age", "3600");

        //设置  受支持请求标头
        response.setHeader("Access-Control-Allow-Headers", "x-requested-with");

        // 指示的请求的响应是否可以暴露于该页面。当true值返回时它可以被暴露
        response.setHeader("Access-Control-Allow-Credentials","true");

        filterChain.doFilter(servletRequest, servletResponse);

    }
}

